Hmm are you trying to look at the files when you're at the Xenium OS screen? or are you trying to look at them when you're in EvoX?..
*looks for a link or two*
http://forums.xbox-scene.com/index.php?showforum=67
^ a bunch of broad threads on the Xenium chip.. Search through there til your eyes bleed.
http://forums.xbox-scene.com/index.php?showtopic=301936
http://forums.xbox-scene.com/index.php?showtopic=299797
http://forums.xbox-scene.com/index.php?showtopic=299145
http://forums.xbox-scene.com/index.php?showtopic=295826
Listening to your description and reading those posts I think you're having probs with the Xenium OS..
Sooo.. in conclusion apparently the right way to fix it is to tweak options in Flash FXP ..
The easy way to get around it would probably be to just use the EvoX FTP instead.